MILLING MACHINE OPERATIONS - OD1644 - LESSON 1/TASK 1
7
Cause
-
Work
improperly
clamped
to
the
table
of
the
milling
machine.
8
Remedy - Check for rocking or movement, and correct by proper
clamping.
9
Cause - Improper ground cutting tool.
10
Remedy - Replace or regrind the tool.
11
Cause - Hard spot at the splice of the drive or the worm belts.
12
Remedy - Replace the belts.
13
Cause - Spindle quill worn in the quill head.
14
Remedy - Tighten the quill head lock slightly.
15
Cause - Incorrect spindle speed, table feed, or both.
16
Remedy - Ordinarily, increase the spindle speed and/or increase or
decrease the feed to break up the vibration period. Experiment by using the
hand feed to feed the table.
17
Cause - Drive pulleys are worn in the grooves or loose on the
shafts.
18
Remedy - Replace the pulleys.
(c)
Boring or Milling Out Of Square Or At An Angle.
1
Cause - The head is not properly aligned with the table.
2
Remedy - Check the head for alignment and correct.
3
Cause - Work improperly set up; i.e., not square or flat.
4
Remedy - Check and re-align the work.
(d)
Failure To Hold The Center Distance When Locating For Boring.
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